Attys



United States Patent 3,014,316 HAND SANDER James A. Barnhart, 340 Florence Road, Constantine, Mich., assignor of one-half to Oscar R. Leiser, Penfield, N.Y.

Filed Mar. 18, 1960, Ser. No. 16,044 3 Claims. (Cl. 51-187) This invention relates to a hand sander or sanding block, and has as its primary object the provision of an improved sanding block provided with means whereby the sandpaper may be changed with a minimum of effort and difficulty.

An additional object of the invention is the provision of such a device which is double-sided, and which may be so arranged to have one grade of sandpaper on one side and another grade of sandpaper on the other side so that either grade will be readily available for immediate use.

A further object of the invention is the provision of such a device having means whereby the used sandpaper may be released substantially immediately, and replaced in a single relatively simple operation.

A further object of the invention is the provision of a sanding block which is easy to grasp, and which may be readily utilized in all sorts of situations where a sanding block is necessary or desirable.

An additional object of the invention is the provision of such a sanding block which is sturdy and durable in construction, reliable and efficient in operation, and relatively simple and inexpensive to manufacture, assemble and utilize.

Still other objects will in part be obvious and in part be pointed out hereinafter and shown in the accompanying drawing wherein:

FIGURE 1 is a side view, partially in perspective of one form of sanding block embodying features of the instant invention shown in assembled relation;

FIGURE 2 is an exploded side plan view of the component parts of the block partially disassembled;

FIGURE 3 is a top plan view of the bottom section of the device as shown in FIGURE 2; and

FIGURE 4 is a sectional view taken substantially along the line 4-4 of FIGURE 1 as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Having reference now to the drawings in detail, the device of the instant invention is generally indicated at 10, and includes an upper portion 11 and a lower porr tion 12, which are complementary, and substantially identical. The upper portion 11 and its complementary lower portion 12 both include a block 13, having cut away portions 14 on the sides thereof to provide hand grips, and relatively smooth outer surfaces covered with a layer 15 of felt or the like, upon which the sandpaper is adapted to rest. Each of the blocks 11 and 12 is on its inner or underside cut away at the opposite ends as' indicated at 16 and 17, respectively, the cut away portions being connected by a centrally positioned longitudinally extending groove or channel 18. Laterally extending semi-circular recesses 19 and 20 extend from the groove 18 to the adjacent cut away portion 14, and are exposed on the outer surface thereof.

The upper block 12 is provided with a pair of aligned recesses 21, which are connected by a transverse bore 22 which extends entirely through the block. The opice posite end of the upper block 11 carries a pair of projecting lugs or tongues 23, which are provided with openings 24. The lugs 23 fit in recesses 25 of the opposed block which are identical to the recesses 21, and which are provided with openings 26, which align with the openings 24. The lower block 12 is provided at its opposite end with tongues 27 which are identical to the tongues 23, and provided with central openings 28, the tongues 27 extending into the recesses 21, the arrangement being such that when the blocks are in assembled relation pins 30 may be extended through the aligned openings 28 and 22, and 26 and 24 to hold the two blocks in related assembly as shown in FIGURE 1.

A relatively triangular wire member 31 is positioned in each of the triangular cut away portions 16 and 17 of one of the blocks, illustratively the lower block 12. Each Wire 31 has a pair of extending end portions 32, which extend into the longitudinal groove 18, and terminate in looped portions '33, which are perpendicular to the plane of the triangular portions 31. Each loop 33 surrounds a crank pin 34, which is carried by a disc 35 which seats in a suitable cut away portion in the adjacent block, as indicated at 36 in FIGURE 2. Each of the discs has a centrally extending operating pin 37, which seats in the opposed aligned grooves 19 and 20 of the opposed portions 12 and 13, the operating pins 37 each extending to the outer surface of the assembled block, and being provided with slots 37a for the reception of a screw driver or the like. The arrangement is obviously such that when the operating pin 37 is turned to the position shown in the left-hand side of FIGURE 3, the bight or base 38 of the triangular member 31 engages against a triangular block 39, which is positioned in the cut away portion 17, clampingly to hold both upper and lower pieces of sandpaper in assembled relation with the device. When the operating pin 37 is moved to the position shown in the right-hand side of FIGURE 3, obviously the base portion 38 of member 31 is moved away from its associated clamping block 39, releasing the end portions of the sandpaper so that they can be removed for replacement as desired.

From the foregoing it will now be seen that there is herein provided an improved sanding block, which accomplishes all the objects of this invention, and others, including 'many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiments hereinbefore shown and described, and it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In a sanding block, the combination of upper and lower complementary sections, each having an outer face adapted to receive a piece of sandpaper, and each having an interior longitudinal groove terminating in each end in a triangular cutout portion, a triangular clamping block in each cutout portion having its base confronting the end of its associated section, a triangular wire having its base extending outwardly of said base of said clamping block, said wire having end portions extending from its apex into said longitudinal groove, loops at the ends of each end portion, a crank pin engaging each loop, and an operating pin extending from each crank pin to the outer side of said block for moving said base of said wire towards and away from said Dec. 26, 1961 J. HANSEN ETAL 3,014,317

FINISHING WHEEL. FOR SHOE MACHINERY Filed NOV. 30, 1959 :75 FIELZ 40 50 INVENTORS;

LOUIS J. HANSEN RICHARD E. TRAVER WW ATTYS. 

